Divide and rule? The military infrastructure of eighth‐ and ninth‐century Mercia

Military might is widely recognized as having been a key element in the Mercian kings’ ability to forge and maintain a large kingdom in midland England in and after the seventh century. The paper argues that its basis was a network of fortified places – all major royal settlements that were given substantial defences in the eighth and early ninth centuries – and a systemic mechanism for manning them. The archaeological evidence of these defences at Hereford, Tamworth and Winchcombe is reviewed; the probable locations of other such early fortified places in midland England are considered; and the significance of this burghal system for our understanding of ‘the supremacy of the Mercian kings’ is weighed.     

Power Relations and Upgrading in the Cashew Value Chain of Côte d'Ivoire

Development organizations are increasingly adopting market‐based approaches to reducing rural poverty and food insecurity in the global South. The value chain approach is particularly popular. Aid donors, governments and non‐governmental organizations are applying value chain concepts originally designed for promoting industrial production to smallholder agricultural production. Cashew development in Côte d'Ivoire illustrates this new approach to rural development in which ‘upgrading’ the production and processing links are top priorities. A core assumption informing this approach is that improvements in product quality at the producer level will yield higher producer prices and incomes. This article examines this assumed quality–price relationship through a comparative analysis of cashew quality and prices in Côte d'Ivoire. The research reveals a disconnect between nut quality and producer prices. The case study demonstrates that power relations are more important than quality in setting producer prices for raw cashew nuts.     

In search of the optimum Raman/IR signatures of potential ingredients used in San/Bushman rock art paint

Vibrational spectroscopy (Raman and FTIR) has played an important role in identifying pigments, substrata and deterioration products in rock art studies worldwide: in the laboratory and on-site. However, the detection of organic binders and carrying agents has so far been scarce and the quality of many spectra recorded on-site inadequate. In this study, possible pigments (charcoal, ochre, raptor faeces, thermally treated ostrich egg shell, etc.), binders (fat, egg, blood) and carrying agents (saliva, gall, egg, water) were selected based on artistic considerations and analysed with FTIR and Raman (514.6 and 785 nm excitation, both available in mobile instruments) spectroscopy in order to determine usable marker bands for each ingredient. The resultant marker bands were then used to analyse five ten year old San replica paints. It was found that FTIR spectroscopy is very efficient to identify organic compounds as there is no fluorescence but the broadness of the bands inhibits the exact assignment of many ingredients. A high fluorescence background experienced for many natural products prevented the recording of Raman spectra for all ingredients, in many instances though the sharp peaks usually associated with Raman spectra make identification easier than with FTIR spectroscopy. Most of the ingredients in the paints could be identified, but it is clear that better results are obtained when more that one technique is used.     

Does Diversity Matter? Measuring the Impact of High School Diversity on Freshman GPA

At the heart of arguments for affirmative action in university admissions are various claims about ethnic diversity. One assertion is that a diverse student body improves the quality of the educational experience: all students learn more. Further, a diverse educational experience better prepares students for the pluralistic society in which they will live. Previous studies examining these issues have been based on informal and survey methods. To better assess the impact of diversity we utilize a data set that allows us to measure student performance at the University of Illinois at Chicago (UIC) as a function of the diversity of a student's high school. Do students from diverse high schools do better in the ethnically diverse environment at UIC? After controlling for other factors that affect GPA, such as ACT, high school rank, and high school quality, we find significant diversity impacts. Depending on the diversity measure, a student from a very diverse high school has an expected first semester GPA that is a one‐fourth to one‐half point higher than a student from a nondiverse high school. The diversity impacts tend to be greater for students in the lower tail of the GPA distribution. There are also large gender differences with females helped most by diversity. Although the results represent outcomes at only one university, they nevertheless serve as a starting point for quantitatively assessing the impact of a diverse learning environment.     

The Copper CHARM Set: A New Set of Certified Reference Materials for the Standardization of Quantitative X‐Ray Fluorescence Analysis of Heritage Copper Alloys*

This paper introduces a new set of certified reference materials designed to aid scientists and conservators working in cultural heritage fields with quantitative X‐ray fluorescence analysis of historical and prehistoric copper alloys. This set has been designated as the Copper CHARM Set (Cultural Heritage Alloy Reference Material Set). The Copper CHARM Set is designed to be used by a wide range of museum‐, art‐ and archaeology‐oriented scientists and conservators to help improve the accuracy and range of their calibrations for quantitative ED–XRF spectrometry of copper alloys, and also increase the number of elements that can routinely be quantified. In addition, the common use of a single core set of the reference materials is designed to significantly improve inter‐laboratory reproducibility, allowing greater data sharing between researchers and thus furthering possibilities for collaborative study.     

Women's Cotton and the Spaces of Gender Politics in Northern Cote d'Ivoire

This article seeks to contribute to the gender and 'development' literature by showing how gender struggles over women's economic autonomy from cotton growing are played out at multiple geographical scales. The main argument is that 'men' and 'women' do not simply negotiate over cash cropping within the household. Women in particular find it necessary to 'jump' the scale of the household in order to secure productive resources for cash cropping. Drawing upon the notion of 'scalar politics,' this article illuminates the multiple processes and scaled spaces in which women's economic autonomy expands and contracts around the cultivation of cotton. It is inspired by feminist political ecological approaches to examine how the micro-politics of gender interact with meso- and macro-level agroecological and political economic processes affecting women's poverty and empowerment. Based on longitudinal research in northern Côte d'Ivoire, it shows how women of different sociocultural and economic standing negotiate access to productive resources at multiple scales, and how some men seek to restrict these initiatives. As women search for solutions to contradictions in gendered social relations of production, at different geographical scales, they have simultaneously dispersed the site of gender struggles to other locations (the marketplace and women's personal fields). Male household heads now find it necessary to contest women's cotton growing in these gendered spaces in their attempt to control their wives' labor.